article: Today is Saturday. The students of Grade Seven go to school early, but they have no classes. Their teachers are going to take them to the zoo. They take buses there. They get there at 8:30 a.m.
  The zoo is very beautiful. There are many trees, some hills and a big lake. And they have a big lunch there. It's spring now, and you can see many flowers there, too. There are also many people. They like to watch monkeys. They have a good time there. They leave the zoo at 3:30 p.m.
question: The students get to the zoo  _  .
options: in the afternoon in the morning at noon in the evening